BlackCAT A Catalog of Stellar-Mass Black Holes in X-ray Binaries

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ID# 31

XTE J1859+226

V406 Vul

(Garnavich1999)

RA     (ICRS)     DEC

[hh:mm:ss.ss]          [dd:mm:ss.ss]

18:58:41.58  +22:39:29.40

ℓ                      b

[deg]                            [deg]

054.0460820  08.60760698

Year of discovery: 1999  
(Wood1999)

# of outbursts after discovery: 2


Basic data
Distance [kpc] 12.5±1.5 Corral-Santana2011
Distance to the plane (z) [kpc] 1.9±0.2 Corral-Santana2011
Orbital period (Porb) [h] 6.58±0.05
6.624±0.072 		Corral-Santana2011

YanesRizo2022
Peak X-ray flux [erg s-1 cm-2]
[keV]		 3.35E-08
[2-10]		 Wood1999
Outburst magnitude (AB) R∼15.2 Garnavich1999Zurita2002
Quiescent magnitude (AB) R=22.54±0.07 Zurita2002Gelino2010
E(B-V) [mag] 0.58 Hynes2002

Dynamically confirmed BH


NOTES
XTE J1859+226 showed an outburst in 2021 that was discovered in the optical with the Zwicky Transient Facility (Bellm2021)

Dynamical parameters
Orbital period [h] 6.58±0.05
6.624±0.072 		Corral-Santana2011

YanesRizo2022
Star's spectral type ~K5V
K5-K7V		 Corral-Santana2011

YanesRizo2022
Star's radial velocity amplitude (K2) [km/s] 541±70
562±40 		Corral-Santana2011

YanesRizo2022
Mass function 'f(M1)' [M☉] 4.5±0.6
5±1 		Corral-Santana2011

YanesRizo2022
BH mass (M1) [M☉] >5.42
8±2 		Corral-Santana2011

YanesRizo2022
Mass ratio (q=M2/M1) 0.07±0.01 YanesRizo2022
Inclination angle (i) [deg] <70
67±4 		Corral-Santana2011

YanesRizo2022



Optical/NIR magnitudes
Mag. Outburst (AB)
Garnavich1999Zurita2002
V=15.3 R∼15.2 I=15.01
Mag. Quiescent (AB)
Zurita2002Gelino2010
V=23.25±0.09 R=22.54±0.07
J=20.97±0.03 H=20.68±0.05 Ks=20.94±0.35
Aladin finding chart
Scroll to zoom. Set survey image in "Manage layers"
Default image: DSS2 Red
XTE J1859+226 in Simbad

Pan-STARRS1 finding chart

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PS1 Finding chart PS1 Finding chart

Finding charts

Orientation: North up, East left. Object marked
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Finding chart reference: Zurita2002

Finding chart
Finding chart
Finding chart

Comparison stars (AB mag)

Zurita2002
RC1=20.37±0.06 RC2=19.47±0.05 RC3=18.92±0.05
RC4=20.21±0.06 RC5=19.64±0.05


This research has made use of NASA's Astrophysics Data System (ADS), the SIMBAD database operated at CDS (Strasbourg, France) and APLpy
Please acknowledge the use of this catalogue in any published work you derive from it.
Last modified: 02 February 2025.